Many fear an unsustainable explosion in global population, but in fact the population bomb is being defused round the world by women making new choices about their own lives. By mid-century the world’s population could be falling. Fred Pearce, is an international speaker, journalist and author on environmental issues, and was recently described as ‘one of Britain’s finest scientific writers’. He will explore our emerging new demography, a world of massive migration and rapid ageing, where some societies may face extinction through having too few babies, not too many. What does this mean for our environment – for our species? Fred is currently Environmental Consultant to the New Scientist, and his recent book ‘Peoplequake Mass Migration, Ageing Nations and the Coming Population Crash’ was published this year.